I upgraded the symbols with what I got after several tries (only the 0 seems to have several hashes) but that unfortunately does not fix another error occurring after the login:

Traceback (most recent call last):
  File "/home/user/app/build/server/providers/weboob/py/main.py", line 682, in fetch
    results['values'] = self.get_operations(from_date)
  File "/home/user/app/build/server/providers/weboob/py/main.py", line 565, in get_operations
    for account in list(self.backend.iter_accounts()):
  File "/home/user/data/weboob-data/modules/2.1/ing/api_browser.py", line 331, in iter_matching_accounts
    web_accounts = list(self.get_web_accounts())
  File "/home/user/data/weboob-data/modules/2.1/ing/api_browser.py", line 88, in wrapper
    self.redirect_to_old_browser()
  File "/home/user/data/weboob-data/modules/2.1/ing/api_browser.py", line 261, in redirect_to_old_browser
    timeout=120,
  File "/weboob/weboob/browser/browsers.py", line 905, in location
    response = self.open(*args, **kwargs)
  File "/weboob/weboob/browser/browsers.py", line 892, in open
    return super(PagesBrowser, self).open(callback=internal_callback, *args, **kwargs)
  File "/weboob/weboob/browser/browsers.py", line 784, in open
    return super(DomainBrowser, self).open(req, *args, **kwargs)
  File "/weboob/weboob/browser/browsers.py", line 529, in open
    is_async=is_async)
  File "/weboob/weboob/browser/sessions.py", line 162, in send
    return func(*args, **kwargs)
  File "/weboob/weboob/browser/sessions.py", line 155, in func
    return callback(self, resp)
  File "/weboob/weboob/browser/browsers.py", line 517, in inner_callback
    self.raise_for_status(response)
  File "/weboob/weboob/browser/browsers.py", line 557, in raise_for_status
    raise cls(http_error_msg, response=response)
weboob.browser.exceptions.ServerError: 500 Server Error: Erreur Interne de Servlet